Adjustable backrest chair

Abstract

The utility model provides an adjustable back-rest chair which comprises a seat plate, a back plate is installed at one end of the seat plate, a first rotating part is arranged on one side, located on the back plate, of the seat plate, a second rotating part is installed on the other side of the seat plate, and the back plate is rotatably installed on the seat plate through the first rotating part and the second rotating part; the back plate is rotatably mounted on the seat plate through a first rotating part and a second rotating part, one side of the back plate is mounted on the first rotating shaft through a first connecting sleeve, and the other side of the back plate is mounted on the second rotating shaft through a second connecting sleeve; a torsion spring is mounted between the second connecting sleeve and the second housing, so that the back plate is driven to reset through the second connecting sleeve, and the back plate has driving force for rotating towards one side of the seat plate. An adjusting piece for locking the tooth body is arranged on the first cover shell, and a person controls the positioning insertion plate to move through the adjusting plate arranged in a sliding mode so as to lock and fix the tooth body.

Description

Technical Field

[0001] The utility model relates to the technical field of backrest chairs, in particular to an adjustable backrest chair. Background Art

[0002] The backrest chair is a commonly used furniture. The backboard of the existing backrest chair is generally a fixed structure. Due to the difference in height, weight or sitting posture of people, the strength and position of the support provided by the backrest chair to the people are not consistent when sitting on the backrest chair, and the angle of the backrest cannot be adjusted according to the needs. If the backrest chair cannot provide good support for the people, the people cannot relax effectively and are prone to fatigue. In addition, long-term poor sitting posture is likely to cause damage to the spine. Utility Model Content

[0003] The technical problem solved by the utility model is to provide an adjustable backrest chair, the back panel of which can be adjusted according to the needs of the personnel to improve the comfort, so as to solve the problems raised in the above-mentioned background technology.

[0004] The technical problem solved by the utility model is achieved by the following technical solutions:

[0005] An adjustable backrest chair, comprising:

[0006] A seat plate, one end of which is provided with a back plate, a first rotating member is provided on one side of the seat plate located at the back plate, and a second rotating member is provided on the other side of the seat plate, and the back plate is rotatably mounted on the seat plate through the first rotating member and the second rotating member;

[0007] The first rotating member includes:

[0008] A first rotating shaft, the first rotating shaft is fixedly mounted on one side of the seat plate;

[0009] A first connecting member, the first connecting member is fixedly connected to the back plate, and the first connecting member is rotatably mounted on the first rotating shaft;

[0010] A first cover shell, the first cover shell is sleeved on the outer ends of the first rotating shaft and the first connecting member, and is fixedly connected to the seat plate;

[0011] An adjusting member, the adjusting member is mounted on the outer end of the first housing, and a corresponding adjusting hole is opened in the first housing corresponding to the adjusting member, the adjusting hole is a strip-shaped structure, and the adjusting member passes through the adjusting hole to lock the first connecting member;

[0012] The second rotating member includes:

[0013] A second rotating shaft, the second rotating shaft is fixedly mounted on a side of the seat plate away from the first rotating shaft and is symmetrically arranged with the first rotating shaft;

[0014] A second connecting member, the second connecting member is fixedly connected to the back plate and rotatably mounted on the second rotating shaft;

[0015] A second cover shell, which is sleeved on the outer end of the second connecting member and fixedly connected to the seat plate;

[0016] An elastic member is installed between the second connecting member and the second cover shell to drive the second connecting member to move elastically.

[0017] As a further solution of the utility model:

[0018] The first connecting member includes a first connecting sleeve and a tooth body integrally arranged at the outer end of the first connecting sleeve. An axial hole is provided in the middle of the first connecting sleeve and the tooth body, and the first connecting sleeve is rotatably sleeved on the first rotating shaft. The outer end of the first rotating shaft is connected to the first cover shell to limit the first connecting member. The outer end of the first connecting sleeve is integrally provided with a first connecting rod, and is connected to the back plate through the first connecting rod; tooth blocks are annularly distributed on the tooth body, and slots are formed between adjacent tooth blocks.

[0019] As a further solution of the utility model:

[0020] The adjusting member comprises:

[0021] Guide plates, wherein two groups of guide plates are provided and symmetrically mounted on both sides of the outer end of the first housing, and sliding grooves are provided on the opposite sides of the two groups of guide plates;

[0022] An adjustment plate, wherein slide plates are integrally provided on both sides of the adjustment plate, and the slide plates on both sides are respectively slidably installed in the slide grooves of the corresponding guide plates, so that the adjustment plate is slidably connected on the guide plates;

[0023] A positioning plug plate, which is fixedly mounted on one side of the outer end of the adjustment plate and passes through the corresponding adjustment hole on the first housing. The adjustment plate drives the positioning plug plate to move forward and backward on the adjustment hole so that the positioning plug plate is inserted into the slot, thereby locking the gear body;

[0024] A push handle is installed at the outer end of the adjustment plate to push the adjustment plate to move forward and backward in the slide slot, thereby controlling the position of the positioning plug plate.

[0025] As a further solution of the utility model:

[0026] The guide plate is located in the slide groove and is also equipped with a return spring. The slide plate is equipped with a spring rod corresponding to the return spring. One end of the return spring is against the guide plate, and the other end is sleeved on the outer end of the spring rod and against the slide plate, so that the positioning plug plate has the power to move toward one side of the tooth body, preventing the positioning plug plate from arbitrarily detaching from the slot, thereby improving the stability of the back plate.

[0027] As a further solution of the utility model:

[0028] The second connecting member includes a second connecting sleeve, which has an axial hole in the middle and is rotatably sleeved on the second rotating shaft. A second connecting rod is integrally provided at the outer end of the second connecting sleeve to connect with the back plate through the second connecting rod.

[0029] As a further solution of the utility model:

[0030] The elastic member is a torsion spring, one end of which is disposed on the second connecting sleeve, and the other end of which is disposed on a corresponding position of the second cover shell, so as to drive the back plate to reset through the second connecting sleeve.

[0031] As a further solution of the utility model:

[0032] The upper end of the first cover shell is provided with a limiting groove corresponding to the first connecting sleeve, and the upper end of the second cover shell is also provided with a limiting groove corresponding to the second connecting sleeve, so as to limit the first connecting sleeve and the second connecting sleeve respectively, thereby limiting the adjustment angle of the back plate.

[0033] Compared with the prior art, the beneficial effects of the utility model are as follows: the back plate can be rotatably mounted on the seat plate through the first rotating member and the second rotating member, one side of the back plate is mounted on the first rotating shaft through the first connecting sleeve, and the other side is mounted on the second rotating shaft through the second connecting sleeve; a torsion spring is installed between the second connecting sleeve and the second cover shell to drive the back plate to reset through the second connecting sleeve, so that the back plate has a driving force to rotate toward one side of the seat plate. An adjustment member for locking the tooth body is provided on the first cover shell, and a person controls the movement of the positioning plug plate through a sliding adjustment plate to lock and fix the tooth body. The device is easy to operate and can quickly adjust the angle of the back plate to meet the use needs of different people and improve the comfort of people. A torsion spring is provided to automatically reset the back plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0035] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;

[0036] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0037] Figure 4 for Figure 2 The enlarged structural diagram at B in the middle;

[0038] Markings in the figure: 1. seat plate; 2. back plate; 3. first rotating member; 4. second rotating member; 5. adjusting member; 31. first rotating shaft; 32. first cover shell; 33. adjusting hole; 34. first connecting sleeve; 35. tooth body; 36. first connecting rod; 37. tooth block; 38. limiting groove; 41. second rotating shaft; 42. second connecting sleeve; 43. second connecting rod; 44. second cover shell; 45. torsion spring; 51. guide plate; 52. adjusting plate; 53. positioning plug plate; 54. push handle; 55. reset spring; 56. spring rod; 57. slide plate. DETAILED DESCRIPTION

[0039] In order to make the technical means for realizing the utility model, creative features, objectives and effects easy to understand, the utility model is further explained below with reference to specific illustrations.

[0040] like Figures 1 to 4 As shown,

[0041] This embodiment provides an adjustable backrest chair, comprising:

[0042] A seat plate 1, with a back plate 2 mounted on one end of the seat plate 1, a first rotating member 3 is provided on one side of the seat plate 1 located at the back plate 2, and a second rotating member 4 is installed on the other side, and the back plate 2 is rotatably mounted on the seat plate 1 through the first rotating member 3 and the second rotating member 4;

[0043] The first rotating member 3 includes:

[0044] A first rotating shaft 31, which is fixedly mounted on one side of the seat plate 1;

[0045] A first connecting member, the first connecting member is fixedly connected to the back plate 2, and the first connecting member is rotatably mounted on the first rotating shaft 31;

[0046] A first cover shell 32, which is sleeved on the outer ends of the first rotating shaft 31 and the first connecting member and is fixedly connected to the seat plate 1;

[0047] The adjusting member 5 is installed at the outer end of the first housing 32, and the first housing 32 is provided with a corresponding adjusting hole 33 corresponding to the adjusting member 5. The adjusting hole 33 is a strip-shaped structure, and the adjusting member 5 passes through the adjusting hole 33 to lock the first connecting member;

[0048] The second rotating member 4 includes:

[0049] A second rotating shaft 41, which is fixedly mounted on a side of the seat plate 1 away from the first rotating shaft 31 and is symmetrically arranged with respect to the first rotating shaft 31;

[0050] A second connecting member, the second connecting member is fixedly connected to the back plate 2 and rotatably mounted on the second rotating shaft 41;

[0051] A second cover shell 44, which is sleeved on the outer end of the second connecting member and fixedly connected to the seat plate 1;

[0052] An elastic member is installed between the second connecting member and the second cover shell 44 to drive the second connecting member to move elastically.

[0053] In this embodiment, the first connecting member includes a first connecting sleeve 34 and a tooth body 35 integrally arranged at the outer end of the first connecting sleeve 34. An axial hole is provided in the middle of the first connecting sleeve 34 and the tooth body 35, and is rotatably sleeved on the first rotating shaft 31. The outer end of the first rotating shaft 31 is connected to the first cover shell 32 to limit the first connecting member. The outer end of the first connecting sleeve 34 is integrally provided with a first connecting rod 36, and is connected to the back plate 2 through the first connecting rod 36; the tooth body 35 is annularly distributed with tooth blocks 37, and a groove is formed between adjacent tooth blocks 37.

[0054] In this embodiment, the adjusting member 5 includes:

[0055] Guide plates 51, wherein two groups of guide plates 51 are provided and symmetrically mounted on both sides of the outer end of the first housing 32, and sliding grooves are provided on the opposite sides of the two groups of guide plates 51;

[0056] An adjusting plate 52, with slide plates 57 integrally provided on both sides of the adjusting plate 52, and the slide plates 57 on both sides are slidably mounted in the slide grooves of the corresponding guide plates 51, so that the adjusting plate 52 is slidably connected to the guide plates 51;

[0057] A positioning plug plate 53, which is fixedly mounted on one side of the outer end of the adjustment plate 52 and passes through the corresponding adjustment hole 33 on the first housing 32. The adjustment plate 52 drives the positioning plug plate 53 to move forward and backward on the adjustment hole 33, so that the positioning plug plate 53 is inserted into the slot, thereby locking the tooth body 35;

[0058] The push handle 54 is installed at the outer end of the adjustment plate 52 to push the adjustment plate 52 to move forward and backward in the slide groove, thereby controlling the position of the positioning plug plate 53.

[0059] The guide plate 51 is located in the slide groove and is also equipped with a return spring 55. The slide plate 57 is equipped with a spring rod 56 corresponding to the return spring 55. One end of the return spring 55 is against the guide plate 51, and the other end is sleeved on the outer end of the spring rod 56 and against the slide plate 57, so that the positioning plug plate 53 has the power to move toward the side of the tooth body 35, preventing the positioning plug plate 53 from arbitrarily escaping from the slot, thereby improving the stability of the back plate 2.

[0060] In this embodiment, the second connecting member includes a second connecting sleeve 42 , which has an axial hole in the middle and is rotatably sleeved on the second rotating shaft 41 . A second connecting rod 43 is integrally formed at the outer end of the second connecting sleeve to connect to the back plate via the second connecting rod 43 .

[0061] The elastic member is a torsion spring 45 , one end of which is disposed against the second connecting sleeve 42 , and the other end of which is disposed against a corresponding position of the second cover shell 44 , so as to drive the back plate 2 to reset through the second connecting sleeve 42 .

[0062] In this embodiment, a limiting groove 38 is provided at the upper end of the first cover shell 32 corresponding to the first connecting sleeve 34, and a limiting groove is also provided at the upper end of the second cover shell 44 corresponding to the second connecting sleeve 42, so as to limit the first connecting sleeve 34 and the second connecting sleeve 42 respectively, thereby limiting the adjustment angle of the back panel 2.

[0063] The working principle of the utility model is as follows: the back plate 2 is rotatably mounted on the seat plate 1 through the first rotating member 3 and the second rotating member 4, one side of the back plate 2 is mounted on the first rotating shaft 31 through the first connecting sleeve 34, and the other side is mounted on the second rotating shaft 41 through the second connecting sleeve 42;

[0064] A torsion spring 45 is installed between the second connecting sleeve 42 and the second cover shell 44 to drive the back plate 2 to return to its original position through the second connecting sleeve 42 , so that the back plate 2 has a driving force to rotate toward one side of the seat plate 1 .

[0065] The first cover shell 32 is provided with an adjustment member 5 for locking the tooth body 35. The personnel controls the movement of the positioning plug plate 53 by sliding the adjustment plate 52. When the positioning plug plate 53 is out of the slot of the tooth body 35, the back plate 2 can be rotated toward the side of the seat plate 1 under the push of the torsion spring 45. The personnel can also use their backs to push the back plate 2 backward to adjust the back plate 2 to a suitable angle, and then insert the positioning plug plate 53 into the slot of the tooth body 35 to fix the tooth body 35. A return spring 55 is provided in the slide groove of the guide plate 51 to push the adjustment plate 52 to move outward, so that the positioning plug plate 53 is stably inserted into the slot of the tooth body 35, thereby improving the stability of the back plate 2.

[0066] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will also have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents. It should be noted that in this article, if there are first and second relationship terms such as only used to distinguish one entity or operation from another entity or operation, it does not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or equipment. Without more constraints, an element defined by the phrase "comprising a..." does not exclude the existence of other identical elements in the process, method, article or apparatus comprising the element.

Claims

1. An adjustable backrest chair, characterized in that: include: A seat plate, one end of which is provided with a back plate, a first rotating member is provided on one side of the seat plate located at the back plate, and a second rotating member is provided on the other side of the seat plate, and the back plate is rotatably mounted on the seat plate through the first rotating member and the second rotating member; The first rotating member includes: A first rotating shaft, the first rotating shaft is fixedly mounted on one side of the seat plate; A first connecting member, the first connecting member is fixedly connected to the back plate, and the first connecting member is rotatably mounted on the first rotating shaft; A first cover shell, the first cover shell is sleeved on the outer ends of the first rotating shaft and the first connecting member, and is fixedly connected to the seat plate; An adjusting member, the adjusting member is mounted on the outer end of the first housing, and a corresponding adjusting hole is opened in the first housing corresponding to the adjusting member, the adjusting hole is a strip-shaped structure, and the adjusting member passes through the adjusting hole to lock the first connecting member; The second rotating member includes: A second rotating shaft, the second rotating shaft is fixedly mounted on a side of the seat plate away from the first rotating shaft and is symmetrically arranged with the first rotating shaft; A second connecting member, the second connecting member is fixedly connected to the back plate and rotatably mounted on the second rotating shaft; A second cover shell, which is sleeved on the outer end of the second connecting member and fixedly connected to the seat plate; An elastic member is installed between the second connecting member and the second cover shell to drive the second connecting member to move elastically.

2. The adjustable backrest chair according to claim 1, characterized in that: The first connecting member includes a first connecting sleeve and a tooth body integrally arranged at the outer end of the first connecting sleeve. An axial hole is provided in the middle of the first connecting sleeve and the tooth body, and the first connecting sleeve is rotatably sleeved on the first rotating shaft. The outer end of the first rotating shaft is connected to the first cover shell to limit the first connecting member. The outer end of the first connecting sleeve is integrally provided with a first connecting rod, and is connected to the back plate through the first connecting rod; tooth blocks are annularly distributed on the tooth body, and slots are formed between adjacent tooth blocks.

3. The adjustable backrest chair according to claim 2, characterized in that: The adjusting member comprises: Guide plates, wherein two groups of guide plates are provided and symmetrically mounted on both sides of the outer end of the first housing, and sliding grooves are provided on the opposite sides of the two groups of guide plates; An adjustment plate, wherein slide plates are integrally provided on both sides of the adjustment plate, and the slide plates on both sides are respectively slidably installed in the slide grooves of the corresponding guide plates, so that the adjustment plate is slidably connected on the guide plates; A positioning plug plate, which is fixedly mounted on one side of the outer end of the adjustment plate and passes through the corresponding adjustment hole on the first housing. The adjustment plate drives the positioning plug plate to move forward and backward on the adjustment hole so that the positioning plug plate is inserted into the slot, thereby locking the gear body; A push handle is installed at the outer end of the adjustment plate to push the adjustment plate to move forward and backward in the slide groove.

4. The adjustable backrest chair according to claim 3, characterized in that: The guide plate is located in the slide groove and is also equipped with a return spring. The slide plate is equipped with a spring rod corresponding to the return spring. One end of the return spring is against the guide plate, and the other end is sleeved on the outer end of the spring rod and against the slide plate, so that the positioning plug plate has the power to move toward one side of the tooth body.

5. The adjustable backrest chair according to claim 2, characterized in that: The second connecting member includes a second connecting sleeve, which has an axial hole in the middle and is rotatably sleeved on the second rotating shaft. A second connecting rod is integrally provided at the outer end of the second connecting sleeve to connect with the back plate through the second connecting rod.

6. The adjustable backrest chair according to claim 5, characterized in that: The elastic member is a torsion spring, one end of which is disposed on the second connecting sleeve, and the other end of which is disposed on a corresponding position of the second cover shell, so as to drive the back plate to reset through the second connecting sleeve.

7. The adjustable backrest chair according to claim 5, characterized in that: The upper end of the first cover shell is provided with a limiting groove corresponding to the first connecting sleeve, and the upper end of the second cover shell is also provided with a limiting groove corresponding to the second connecting sleeve, so as to limit the first connecting sleeve and the second connecting sleeve respectively.

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